What inequality has the solution n< 5

What are the triple angle formulas? is it related to double angle identities?

Item 1 use the polygon tool to draw a rectangle with a length of 4 units and a height of 2 units. one of the sides of the rectangle falls on line ef , and the rectangle has a vertex of e. each segment on the grid represents 1 unit.

Tiene pendiente -4 y pasa por el punto (-3, -2) encuentre la ecuación de la recta , ayuden porfa urgente